JP4049266B2 - Fixing structure of column base - Google Patents

Description

  The present invention relates to a fixing structure for fixing a column base having a base plate at a lower end portion to a concrete foundation.

  In various structures such as building structures and civil engineering structures, a base plate is provided at the lower end of the column base of the roof structure in order to fix the structure such as the roof structure to the concrete foundation. It is fixed by anchor bolts embedded in the foundation.

Specifically, as shown in FIG. 7, a plurality of anchor bolts 52, 52... Are embedded with the upper end protruding from the concrete foundation 51, and the lower end of the column base 56 is If a base plate 55 having bolt holes is fixed by welding or the like at positions corresponding to the anchor bolts 52, 52... And a level adjusting mortar 53 is placed on the upper surface of the concrete foundation 51, the bolt holes of the base plate 55 Are installed on the upper surface of the level adjusting mortar 53 while being passed through the anchor bolts 52, 52, and are fastened by nut members 54, 54 screwed to the anchor bolt 52 (the following Patent Documents 1, 2). Etc.).
JP-A-8-184061 Japanese Patent Laid-Open No. 11-117321

  However, in the case of the fixing structure of the column base, the anchor bolt cannot be inserted if the position of the bolt hole of the base plate and the position of the anchor bolt are slightly shifted. While paying close attention, the anchor bolt had to be positioned at a regular position with high accuracy, and much work was required for the centering surveying work and the anchor bolt positioning work.

  In particular, in the case of a secondary structure such as a greenhouse, which will be described later, or a temporary housing, there is a high demand for simplification of construction, cost reduction, and process shortening. Positioning work takes a lot of labor and time, and this is a cause of failure to satisfy the above requirements. In particular, the former greenhouse structure has a large number of column bases as compared with other structures, so that the centering surveying work and the anchor bolt positioning work have become a great burden. In addition, since the manufacturing accuracy of the greenhouse structure is a secondary structure, it is difficult to expect the same manufacturing accuracy as that of a normal building structure, which may cause misalignment with the anchor bolt. In many cases, there has been a strong demand for a fixing structure for the base of the column base that allows these manufacturing accuracy.

  Therefore, the main problem of the present invention is to reduce the burden of centering surveying work and anchor bolt positioning work, making it easy and labor-saving to fix the column base to the concrete foundation, and reducing the construction cost, etc. An object of the present invention is to provide a fixing structure for a column base that can be realized.

As the present invention according to claim 1 for solving the above-mentioned problem, a fixing structure for fixing a column base provided with a base plate at a lower end portion to foundation concrete,
The base plate is held so as to be pressed from the upper surface side by a presser plate fixed by an anchor bolt embedded in the foundation concrete at an outer side position of the base plate, and the base plate is fixed to the presser plate. A column base having a gap with an anchor bolt to be fixed and having a gap with the column base so that the position can be adjusted in a two-dimensional direction in a plane. A base anchoring structure is provided.

In the first aspect of the present invention, the anchor plate is not inserted through the bolt hole of the base plate and fixed by the nut, but the presser plate disposed on the upper surface side of the base plate is fixed by the anchor bolt. The base plate is held by the presser plate so as to be pressed from the upper surface side. As a result, high accuracy is not required for centering surveying and positioning work of the anchor bolt, and it is possible to have a considerably large tolerance in the installation position of the column base compared to the conventional case. Work is greatly simplified and labor-saving.
In addition, by making it possible to adjust the position of the column base in the two-dimensional direction (X direction, Y direction) in the plane, even if the installation accuracy of the anchor bolt is not high or the manufacturing accuracy of the frame (upper structure) is increased. Even if it is not high, the column base can be reliably installed while absorbing these errors.

As the present invention according to claim 2, wherein the pressing plate, bolt hole for inserting the anchor bolts are formed respectively at both ends, and according to claim 1, wherein are respectively disposed on both sides of the column base The fixing structure of the column base is provided. In order to prevent the column base from falling in all directions, it is desirable to provide the presser plate in a pair of left and right.

As the present invention according to claim 3, post- cast concrete is placed on the upper surface side of the foundation concrete, and the anchor bolt, base plate, and presser plate are covered and concealed. A fusing structure is provided.

  According to a fourth aspect of the present invention, there is provided a fixing structure for a column base according to any one of the first and second aspects, wherein the presser plate and the base plate are integrally coupled by welding.

  As described above in detail, according to the present invention, the burden of centering surveying work and anchor bolt positioning work can be reduced, and fixing of the column base to the concrete foundation can be performed easily and labor-saving, and the construction cost can be reduced. Etc. can be planned.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a greenhouse 1 to which a columnar fixing structure according to the present invention is applied, FIG. 2A is a view taken along the line IIA-IIA in FIG. 1, and FIG. 2B is IIB in FIG. FIG.

  The greenhouse 1 includes a frame 2 composed of pipes, H-shaped ropes, square steel pipes, C-shaped steel materials, and the like, and a solar permeable covering material 3 stretched on the outer surface of the frame so as to cover the space inside the frame. It consists of Since the greenhouse 1 according to this embodiment is a plastic house, a plastic film is used as the solar permeable covering material 3. Specifically, a hard film such as a polyester film or a fluorine film, or a soft film such as a polyolefin film such as a vinyl chloride film or a polyethylene film is used. On the other hand, the frame 2 has a plurality of horizontal connecting members 6, 6 in which a face member composed of intermediate face members 4, 4... And end face members 5, 5 is arranged along the horizontal direction (longitudinal direction). It is the structure connected by.

  In the present example, as shown in FIG. 2 (A), the intermediate face member 4 has side column bases 7 and 7 disposed on both sides thereof arranged in parallel in the cross section in the frontage direction (in the cross section). In addition, the two column bases 7A and 7B are combined into a composite column structure integrally assembled by connecting members such as diagonal members 8, 8... And / or horizontal members 9, 9. The main beam 10 spanned between the composite column bases 7 and 7 is a beam member which is inclined obliquely downward from the substantially top of each composite column base toward the center of the front and joined in the middle. Further, in the composite column base 7, the height of the column base 7 </ b> A positioned relatively outside is made lower than the height of the column base 7 </ b> B positioned relatively inside, and the outside column base 7 </ b> A and the inside column base 7 7B is connected by a curved beam 11. The outer column base 7A and the curved beam 11 may be a continuous and integral member. In this example, the top of the outer column base 7A and the top of the inner column base 7B are connected by the curved beam 11, but may be connected by a straight beam.

  On the other hand, as shown in FIG. 2 (B), the end face member 5 has the same frame structure and basic structure as the intermediate face member 4 described above. It is arrange | positioned by the predetermined space | interval and an entrance / exit part is provided in a predetermined location. In addition, the wife pillar, the wife beam, the duck, etc. for forming the entrance / exit part are omitted from the drawing.

  The present invention is applied to fix the column bases of the inner column base 7 </ b> B, the outer column base 7 </ b> A, and the interposition column base 12 to the foundation concrete 13.

  In the fixing structure of the main column base, as shown in FIGS. 3 and 4, each column base is provided with a base plate 14 at the lower end as in the conventional fixing structure. The presser plate 17 is disposed on the upper surface side of the base plate 14 instead of being fixed by the base plate 14, and the presser plate 17 is fixed by the anchor bolts 15 and 15 so as to press the base plate 14 from the upper surface side. It is.

In more detail below,
In the fixing structure, the anchor bolts 15 are embedded in the foundation concrete 13 on the outer side of the base plate 14, and a plurality of anchor bolts 15 are installed around the anchor plate. In this embodiment, as shown in FIG. 4, two anchor bolts 15, 15 are installed on the outer side of one side of the base plate 14 at an interval, and the other side facing the one side. Two anchor bolts 15 and 15 are installed on the outside of the side at intervals.

The base plate 14 is installed by placing a level adjusting mortar 16 on the upper surface of the foundation concrete 13 and adjusting the height, and then placing the base plate 14 with the level adjusting mortar 16 as a seating surface. Then, the presser plate 17 is arranged on the upper surface of the base plate 14 while inserting the anchor bolts 15 into the bolt holes 17a, 17a at both ends at the both side positions sandwiching the column bases 7A, 7B, 12, respectively. Then, after the washer 18 is disposed, the nut members 19 and 19 are screwed to the anchor bolt 15 to fasten the presser plate 17 and hold the base plate 14 to be pressed from the upper surface side.

The base plate 14 has gaps a ₁ and a ₂ between the anchor bolts 15 and 15 for fixing the presser plate 17, and the presser plate 17 has a gap b between the column bases 7 A, 7 B and 12. ₁ and b ₂ , and in a state before the double nuts 19 and 19 are fastened, the column bases 7 A, 7 B and 12 are flat within the gaps a _1, a _2, b _{1 and} b _2. Therefore, the position can be adjusted in a two-dimensional direction.

  First, as shown in FIG. 5 (A), the fixing structure is constructed by positioning the anchor bolt 15 to be buried by using the presser plate 17 as a gauge when the foundation concrete 13 is constructed. Put concrete up to the top.

  When the construction of the foundation concrete 13 is completed, as shown in FIG. 5 (B), a level adjusting mortar 16 is placed on the upper surface of the foundation concrete 13 to adjust the height of the base plate mounting surface. When the base plate 14 of the column bases 7A, 7B, 12 is placed on the level adjusting mortar 16, the anchor bolt 15 is inserted into the bolt holes 17a, 17a formed at both ends while the anchor bolt 15 is inserted. The holding plate 17 is placed on the upper surface side, and is fastened by nut members 19 and 19 screwed to the anchor bolts, and the base plate 14 is held so as to be pressed from the upper surface side.

  Finally, as shown by the chain line in FIG. 3, in order to process the horizontal force acting on the column base, post-cast concrete 21 is placed on the upper surface side of the foundation concrete 13, and the anchor bolt 15 and the base plate 14 are placed. The presser plate 17 and the like are covered. The horizontal force may be processed by integrating the presser plates 17 and 17 and the base plate 14 by welding. In this case, it is not always necessary to place post-cast concrete, but it is preferable to perform construction in order to prevent corrosion of the anchor bolt 15 and the like.

[Other examples]
(1) In the above-described embodiment, the presser plates 17 and 17 are disposed on both sides in parallel with the sides with the column bases 7A, 7B, and 12 interposed therebetween, but the presser plate 17 may be arranged in any manner. For example, as shown in FIG. 6, the corners of the base plate 14 may be disposed obliquely at the corners so as to press the corners.

It is a side view of the greenhouse 1 to which the fixing structure of the column base which concerns on this invention is applied. (A) is the IIA-IIA arrow directional view of FIG. 1, (B) is the IIB-IIB arrow directional view of FIG. It is a longitudinal cross-sectional view which shows the fixing structure of column base 7A (7B, 12). It is the IV-IV line arrow directional view of FIG. It is construction procedure figure (A), (B) of column base 7A (7B, 12). FIG. 10 is a plan view showing another example of arrangement of the presser plate 17. It is a side view which shows the conventional column base fixing structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Greenhouse, 2 ... Frame, 3 Solar radiation permeable coating material, 4 ... Intermediate surface material, 5 ... End surface material, 6 ... Horizontal connection material, 7 ... Composite column base, 7A ... Outer column base, 7B ... Inside Column base, 8 ... Diagonal material, 9 ... Horizontal material, 10 ... Main beam, 11 ... Curved beam, 12 ... Interstitial column base, 13 ... Base concrete, 14 ... Base plate, 15 ... Anchor bolt, 16 ... Mortar for level adjustment, 17 ... Presser plate, 19 ... Nut member

Claims (4)

A fixing structure for fixing a column base having a base plate at a lower end portion to foundation concrete,
The base plate is held so as to be pressed from the upper surface side by a presser plate fixed by an anchor bolt embedded in the foundation concrete at an outer side position of the base plate, and the base plate is fixed to the presser plate. A column base having a gap with an anchor bolt to be fixed and having a gap with the column base so that the position can be adjusted in a two-dimensional direction in a plane. Base fixing structure.   2. The fixing structure for a column base according to claim 1, wherein bolts for inserting anchor bolts are formed at both ends of the presser plate, and are arranged on both sides of the column base, respectively. The fixing structure for a column base according to any one of claims 1 and 2, wherein post- cast concrete is placed on an upper surface side of the foundation concrete, and the anchor bolt, the base plate, and the presser plate are covered.   The fixing structure of the column base according to claim 1, wherein the presser plate and the base plate are integrally coupled by welding.

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